I think the main problem is just that we don't have a standard library across the browser and server. We have to reinvent everything across both domains because we don't have good building blocks unlike Go which, despite my issues with some the standard library, at least has one.

I'm disappointed that we've fragmented across Node/Deno/Bun, although I was briefly hopeful for Deno since they tried to standardise around ESM and provide a strong standard library. Of course this still had to be bundled for the browser, which has its own issues.